Spectra by Ryoji Ikeda, the London light installation for LIGHTS OUT looms above Westminster - it was designed to be able to be seen across the city and appeared at 10 pm as part of a series of art commissions. 14-18 NOW, the official cultural programme for the WW1 centenary commemorations, has organised a number of events to mark the centenary. As part of that, LIGHTS OUT is a nationwide event which are taking place at hundreds of venues, churches, war memorials and iconic buildings across the country on 4 August between 10pm and 11pm.